Display Data from the Northwind Service

Add a new view to display a list of products. For this, you can use another easy-ui5 sub-generator.

Open a new terminal session, to keep local web server running, and execute:

yo easy-ui5 project newview

The routes are added to the uimodule/webapp/manifest.json file. The generator asks you whether you want to override the manifest.json file. If prompted, accept this.

As you can see in the log, there are two new files and one modified file. As the generator is only able to create boilerplate code, we have to make some modifications to the uimodule/webapp/manifest.json application descriptor.

Open the file and replace the routing pattern of the new view with an empty string.

{
  "name": "Products",
  "pattern": "",
  "target": [
    "TargetProducts"
  ]
},

1. The webapp/view/Mainview.view.xml will be the outer container of the application. Therefore, remove the entire content (nested tags) of the <App> tag.

   <mvc:View controllerName="tutorial.products.controller.MainView"
     displayBlock="true"
     xmlns="sap.m"
     xmlns:mvc="sap.ui.core.mvc">
       <App id="idAppControl" />
   </mvc:View>
   

   

2. The newly generated view webapp/view/Products.view.xml defines one page of the whole application. Replace the current content of the view, the <App> tag, with a page that contains one list that uses an aggregation binding.

   <mvc:View controllerName="tutorial.products.controller.Products" displayBlock="true"
     xmlns="sap.m"
     xmlns:mvc="sap.ui.core.mvc">
     <Page id="Products" title="Available Products">
       <content>
         <List items="{/Products}">
           <StandardListItem type="Active" title="{ProductName}" />
         </List>
       </content>
     </Page>
   </mvc:View>
   

You’ll immediately be able to see that the MainView embeds the Products view and displays an empty list. The list is still empty, because there is not data source bound to the application yet.

To populate the list with items, bind a data source to the application. For this, there exists another sub-generator:

You can find a list of all available sub-generator on GitHub

yo easy-ui5 project newmodel

Again, please accept the modification of the manifest file.

The generator will name the data source based on the URL you specified. You can replace the name in the manifest.json if you don’t like it.

1. All requests to the data source will be sent to <webapp URL>/V2/Northwind/Northwind.svc/.

   Modify the uimodule/webapp/xsapp.json file to redirect the traffic to a destination. Also, turn off the authentication and replace the entire file with the following content.

   {
     "welcomeFile": "/flpSandbox.html",
     "routes": [
       {
         "source": "^/V2/(.*)$",
         "authenticationType": "none",
         "destination": "Northwind",
         "csrfProtection": false
       },
       {
         "source": "^(.*)",
         "target": "$1",
         "authenticationType": "xsuaa",
         "service": "html5-apps-repo-rt"
       }
     ]
   }
   
   

2. You already created a destination named Northwind in Cloud Foundry environment of SAP BTP. Now it’s time to add a mocked destination to your local setup as well.

   Replace the empty array of the property destinations in the uimodule/ui5.yaml file to declare the local destination.

           destinations:
             - name: "Northwind"
               url: "https://services.odata.org/"
   

   YAML is quite nice to read but writing can be cumbersome as the indention of the lines is crucial. Please make sure your file looks exactly as shown in the next screenshot. If you edit these files often, I recommend using IDE plugins to make your life easier like this one to validate the format

3. Switch to the first terminal session, stop the process and restart it. Restarting is necessary because the live-reload feature doesn’t notice changes in the ui5.yaml file.

<ctrl + c>
npm start

Alternatively, you can directly invoke npx ui5 serve -o flpSandbox.html, which is equivalent to npm start or run npx ui5 serve, the later one won’t open a new page in the browser.

Now you should see the Northwind products in the SAPUI5 list control:

In this step, you will add a detail page that shows some additional information. Same as for the overview page, you’ll use the sub-generator to create a new view.

1. Switch back to the second terminal session and run the same sub-generator as before.

   yo easy-ui5 project newview
   

   Parameter	Value
   What is the name of the new view?	ProductDetail
   Would you like to create a corresponding controller as well?	Yes
   Do you want to add an OPA5 page object?	No
   Would you like to create a route in the manifest?	Yes

   Once again, accept that the generator can overwrite the manifest.json file.

2. Open the uimodule/webapp/manifest.json file and add the product ID to the pattern of the newly created route ProductDetail.

   {
     "name": "ProductDetail",
     "pattern": "Product/{productId}",
     "target": [
       "TargetProductDetail"
     ]
   }
   

3. Change the type of the list items and an event listener in the uimodule/webapp/view/Products.view.xml file.

   <StandardListItem type="Navigation" press="handleListItemPress" title="{ProductName}" />
   

   

4. Add navigation logic to the uimodule/webapp/controller/Products.controller.js to handle the press event.

   sap.ui.define([
     "tutorial/products/controller/BaseController"
   ], function (Controller) {
     "use strict";
   
     return Controller.extend("tutorial.products.controller.Products", {
   
       handleListItemPress: function (oEvent) {
         var oRouter = sap.ui.core.UIComponent.getRouterFor(this);
         var selectedProductId = oEvent.getSource().getBindingContext().getProperty("ProductID");
         oRouter.navTo("ProductDetail", {
           productId: selectedProductId
         });
       }
     });
   });
   

   

5. Click on any list item. This should trigger a navigation to a new page.

1. Add controller logic to uimodule/webapp/controller/ProductDetail.controller.js to parse selected product from the routing arguments and to bind the product to the view.

   sap.ui.define([
     "tutorial/products/controller/BaseController"
   ], function(Controller) {
     "use strict";
   
     return Controller.extend("tutorial.products.controller.ProductDetail", {
   
       onInit: function () {
         const oRouter = sap.ui.core.UIComponent.getRouterFor(this);
         oRouter.getRoute("ProductDetail").attachMatched(this._onRouteMatched, this);
       },
   
       _onRouteMatched: function (oEvent) {
         const iProductId = oEvent.getParameter("arguments").productId;
         const oView = this.getView();
         oView.bindElement({
           path: "/Products(" + iProductId + ")",
           events: {
             dataRequested: function () {
               oView.setBusy(true);
             },
             dataReceived: function () {
               oView.setBusy(false);
             }
           }
         });
       },
   
     });
   });
   

2. Add the required declarations to the uimodule/webapp/view/ProductDetail.view.xml view to display some properties.

   <mvc:View controllerName="tutorial.products.controller.ProductDetail" displayBlock="true"
   xmlns="sap.m"
   xmlns:mvc="sap.ui.core.mvc">
     <Page id="ProductDetail" title="Detail Page">
       <VBox>
         <Text text="{ProductName}" />
         <Text text="{UnitPrice}" />
         <Text text="{QuantityPerUnit}" />
         <Text text="{UnitsInStock}" />
       </VBox>
     </Page>
   </mvc:View>
   

3. Once you saved the view, the web app should update automatically and display a view similar to this this one.